Multifrequency Electromagnetic Depth Sounding for Subsurface Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current seismic, electromagnetic, and resistivity methods for detecting subterranean formations are limited in providing comprehensive information on geological deposits at deep depths with high resolution, often requiring large arrays and causing noise pollution.
Innovation Solution
A ground-based remote sensing system using a portable transmitter and receiver setup that generates and receives electromagnetic pulses, allowing for deep-depth investigation with high resolution and distinguishing geological deposits by combining low-frequency and high-frequency waves, processed to provide real-time data on the composition and location of subterranean formations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic methods operate at higher frequencies to improve resolution, then measurement precision improves, but depth of investigation decreases
Solution Approach 1:
The electromagnetic pulse is segmented into multiple frequency components (low frequency and high frequency waves) that are transmitted simultaneously. The low-frequency component penetrates deeper while the high-frequency component provides better resolution, allowing both depth and resolution requirements to be met through frequency separation.
Solution Approach 2:
The system changes the frequency parameter of the electromagnetic wave to achieve different penetration depths and resolutions. By transmitting a composite pulse with multiple frequency components, the system can selectively retrieve information at different depths with appropriate resolution based on the frequency content.
2Loss of information
If traditional seismic methods are used to locate formations, then structural information is obtained, but comprehensive information on geological deposits (oil, gas, brine) is not reliably yielded
Solution Approach 1:
The patent replaces mechanical seismic wave transmission with electromagnetic wave transmission. Electromagnetic waves interact with the electrical properties of subsurface materials (conductivity, permittivity), providing direct information about fluid-saturated formations and geological deposits without relying on mechanical wave propagation and reflection.
Solution Approach 2:
The system uses electromagnetic waves as an intermediary to probe the subsurface. The electromagnetic waves interact with the electrical characteristics of formations, serving as a mediator that provides comprehensive information about both structure and fluid content (oil, gas, brine) simultaneously.
3Productivity
If ground-based remote sensing systems are deployed to provide real-time data, then productivity and ease of operation improve, but device complexity increases
Solution Approach 1:
The ground-based remote sensing system is designed as a multi-functional platform that can detect various types of subsurface formations (hydrocarbons, aquifers, mineral deposits) using the same electromagnetic pulse transmission and reception infrastructure. This universality improves productivity by eliminating the need for multiple specialized systems.
Solution Approach 2:
The system creates a digital copy or model of the subsurface structure through electromagnetic wave interaction and data processing. The processed data represents a virtual image of the subsurface formations, allowing real-time analysis and interpretation without requiring physical access or complex field equipment deployment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and cost-effective detection of hydrocarbons and aquifers simultaneously, reducing environmental impact and operational costs, with the ability to monitor changes in the subsurface without extensive equipment setup, providing accurate depth and composition analysis.
Implementation Method 1
transmitting and receiving electromagnetic waves has a trade-off between resolution and depth of investigation
Implementation Method 2
receiving a reflected electromagnetic wave from the formation with the receiver
Data Source
AI summary
The present disclosure relates to detecting subterranean formations using electromagnetic depth sounding. A method for detecting formation properties may comprise of disposing a transmitter at a surface, disposing a receiver at the surface, coupling a high frequency wave to a low frequency wave to form an electromagnetic pulse, transmitting the electromagnetic pulse into a formation from the transmitter, receiving a reflected electromagnetic wave from the formation with the receiver, and determining the depth and nature of the formation from the surface. A formation measuring system may comprise a transmitter, wherein the transmitter is configured to couple a high frequency wave to a low frequency wave to form an electromagnetic pulse. The formation measuring system may further comprise at least one receiver, a data acquisition system, and an analysis unit.